ShahK., and AliA. “Ulam-Hyers Stability Analysis to a Three-Point Boundary Value Problem for Fractional Differential Equations”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 72, no. 2, Feb. 2020, pp. 147-60, https://umj.imath.kiev.ua/index.php/umj/article/view/371.